Siemens SINUMERIK 840Di sl Function Manual page 71

References:
/PG/ Programming Manual Fundamentals; Position data
Absolute/Incremental end position
The end position can be programmed either absolutely or incrementally. The position is
approached absolutely or incrementally depending on whether G90 or G91 is active in the
main program block currently being processed.
It is possible to explicitly program whether the value must be interpreted as an absolute or
incremental setting:
IC: incremental
AC: absolute
DC: direct i.e. position rotary axis via shortest route
ACN: Position modulo rotary axis absolutely in negative direction of motion
ACP: Position modulo rotary axis absolutely in positive direction of motion
CAC: Traverse axis to coded position absolutely
CIC: Traverseaxis to coded position incrementally
CDC: Traverse rotary axis to coded position via shortest route
CACN: Traverse modulo rotary axis to coded position in negative direction
CACP: Traverse modulo rotary axis to coded position in positive direction
Coded positions are settings stored in machine data.
Example 1 fixed value
ID = 1 EVERY $AA_IM[B] > 75 DO POS[U]=IC(10)
Example 2 current value
The traversing path is generated in real time from a real-time variable:
ID = 1 EVERY $AA_IM[B] > 75 DO POS[U]=$AA_MW[V]-$AA_IM[W] + 13.5
Axial frame
The response of synchronized actions and axial frames is explained in the sections below:
Activation
When positioning motions are executed from synchronized actions, the axial offsets, scaling
and mirroring functions of the programmable and settable frames (G54 etc.) as well as tool
length compensations are all operative.
Synchronized actions
Function Manual, 11/2006, 6FC5397-5BP10-2BA0
Detailed description
2.4 Actions in synchronized actions
; When event occurs, position U-axis
further by 10
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